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Propecia Datasheet.PROPECIA (Finasteride)PROPECIA (finasteride, MSD) is a synthetic 4-azasteroid compound that is a specific inhibitor of Type ll 5a-reductase, an intracellular enzyme that metabolises the androgen testosterone into dihydrotestosterone (DHT). INDICATIONS PROPECIA is indicated for the treatment of men with male pattern hair loss (androgenetic alopecia) to increase hair growth and prevent further hair loss. PROPECIA is not indicated for use in women or children. DOSAGE AND ADMINISTRATION The recommended dosage is one 1 mg tablet daily. PROPECIA may be taken with or without food. In general, daily use for 3 months or more is necessary before increased hair growth and/or prevention of further hair loss is observed. Continued use is recommended to obtain maximum benefit. CONTRAINDICATIONS PROPECIA is contraindicated in the following:
PRECAUTIONS In clinical studies with PROPECIA in men 18-41 years of age, the mean value of serum prostate specific antigen (PSA) decreased from 0.7 ng/mL at baseline to 0.5 ng/mL at Month 12. When PROPECIA is used for treatment of male pattern hair loss in older men who also have benign prostatic hyperplasia (BPH), consideration should be given to the fact that, in older men with BPH, PSA levels are decreased by approximately 50%. PREGNANCY PROPECIA is contraindicated for use in women when they are or may potentially be pregnant. Because of the ability of Type ll 5a-reductase inhibitors to inhibit conversion of testosterone to DHT in some tissues, these drugs, including finasteride, may cause abnormalities of the external genitalia of a male foetus when administered to a pregnant woman. Crushed or broken tablets of PROPECIA should not be handled by women when they are or may potentially be pregnant because of the possibility of absorption of finasteride and the subsequent potential risk to a male foetus. Whole tablets are coated to prevent contact with the active ingredient during normal handling. NURSING MOTHERS PROPECIA is not indicated for use in women. It is not known whether finasteride is excreted in human milk. PAEDIATRIC USE PROPECIA is not indicated for use in children. USE IN THE ELDERLY Clinical studies with PROPECIA have not been conducted in elderly men with male pattern hair loss. DRUG INTERACTIONS No drug interactions of clinical importance have been identified. Finasteride does not appear to affect the cytochrome P450-linked drug metabolising enzyme system. Compounds that have been tested in man have included antipyrine, digoxin, glyburide, propranolol, theophylline, and warfarin and no interactions were found. Although specific interaction studies were not performed, in clinical studies finasteride doses of 1 mg or more were used concomitantly with ACE inhibitors, acetaminophen, alpha blockers, benzodiazepines, beta blockers, calcium-channel blockers, cardiac nitrates, diuretics, H2 antagonists, HMG-CoA reductase inhibitors, prostaglandin synthetase inhibitors (NSAIDs), and quinolones, without evidence of clinically significant adverse interactions. PROPECIA is generally well tolerated. Side effects, which usually have been mild, generally have not required discontinuation of therapy. Finasteride for male pattern hair loss has been evaluated for safety in clinical studies involving more than 3,200 men. In three 12-month, placebo-controlled, double-blind, multicentre studies of comparable design, the overall safety profiles of PROPECIA and placebo were similar. Discontinuation of therapy due to any clinical adverse experience occurred in 1.7% of 945 men treated with PROPECIA and 2.1 % of 934 men treated with placebo. In these studies, the following drug-related adverse experiences were reported in >1 % of men treated with PROPECIA: decreased libido (PROPECIA, 1.8% vs. placebo, 1.3%) and erectile dysfunction (1.3%, 0.7%). In addition, decreased volume of ejaculate was reported in 0.8% of men treated with PROPECIA and 0.4% of men treated with placebo. Resolution of these side effects occurred in men who discontinued therapy with PROPECIA and in many who continued therapy. In a separate study, the effect of PROPECIA on ejaculate volume was measured and was not different from that seen with placebo. Finasteride is also in use for the treatment of older men with BPH at 5 times the dosage recommended for male pattern hair loss. Additional side effects that have been reported in post-marketing experience at the 5mg dosage in men with BPH are: breast tenderness and enlargement, and hypersensitivity reactions, including lip swelling and skin rash. In the clinical studies with PROPECIA, the incidence of these events was not different from placebo. OVERDOSAGE In clinical studies, single doses of finasteride up to 400 mg and multiple doses of finasteride up to 80 mg/day for three months did not result in side effects. No specific treatment for overdosage with PROPECIA is recommended. AVAILABILITY PROPECIA is available in packs of 28 tablets. COMPOSITION Active ingredients: Each film-coated tablet of PROPECIA contains 1 mg of finasteride.
Inactive ingredients: Store below 30'C. Keep container closed and protect from moisture. The information on this web page is based on the Propecia Prescribing Information Circular produced by Merck Sharp and Dohme (New Zealand) Limited.
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